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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb19b1b1a541f44cd025959618822f0186785c64893431e7c02bc6db6ea0c6eb' 
  AND token = '1Jow6fDWJ5a9jaILaJ3WV71sYou7vNSbZO5g4p6rgcQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}